Scale: circa 1:750,000. Blue-back chart. Nine insets. Lights coloured. Unidentified ship's track in manuscript pencil. Annotations in manuscript pencil. Trade label of William Alder, Chart and Nautical Instrument Warehouse, Ridley Street, Blyth Insets: 1. North-east coast of Gottland circa 1:200,000; 2. South-east coast of Gottland circa 1:200,000; 3. South end of Oland circa 1:200,000; 4. Ronne Harbour (Bornholm) circa 1:17,000; 5. Ertholms (Christianso) circa 1:19,000; 6. Utklipporna circa 1:19,000; 7. Filsand Islands (Vilsandi Saar) circa 1:200,000; 8. North and of Oland circa 1:150,000; 9. Entrance to the Gulf of Riga circa 1:200,000.